They've obviously re-used some old short engine mounts.
But to make them fit tight, have used cut up bits of tin can to wedge in
Good bodge !!

Ha ha reminds me of an Indian mate of mine bought a Sherpa van off a Gipsy and the engine blew up after a day. Stripped it down and there was bits of coke can behind the big end bearings to try to take up the wear. Still got the bits somewhere i'll take a pic.